Exercise 5

1. I'll be very happy if I'll pass the exam. ×

2. If she's from Greece, she speaks Greek. ✓

3. If it didn't rain, I would have played tennis. ×

4. I would put on a sweater if I were you. ✓

5. Everything would have been OK if I hadn't lost my keys. ✓

6.  If I'm sleepy, I drink a cup of coffee. ✓

7. If the electrician didn't come today, maybe he'll come tomorrow. ×

8. If we left early tomorrow morning, we would arrive before 12.00. ×

9. You can't come in here unless you don't have a ticket. ✓

10. I wish I hadn't said that. ✓

11. If he would work harder, he passed his exams. ×

12. I wouldn't do that if I were you. ✓

13. If you didn't help me, I would have been in trouble. ×

14. If I don't see you today, I see you tomorrow. ×

15. If I could speak Italian, I could go and work in Rome. ×

Exercise 6

It's time the government did something valuable for the citizens.

Exercise 7

I'd rather they spent the money on the decorations of the cities.